package com.qk.filter;

import jakarta.servlet.*;

import java.io.IOException;
//@WebFilter(urlPatterns = "/*")
public class DemoFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("初始化过滤器");
    }
//每一次拦截到的请求，都会执行该方法
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("执行次方法");
        //放行
        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {
        System.out.println("销毁过滤器");
    }
}
